A centralized hydrogen supply system for analysis

Abstract

This invention discloses a centralized hydrogen supply system for analysis, belonging to the field of hydrogen supply technology. The system includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via pipelines. The corresponding pipelines are sequentially equipped with a manual valve a, a one-way valve a, a regulating valve a, a manual valve c, a sampler a, a one-way valve b, a manual valve x, and a sampler b. Manual valve b is connected in parallel to both ends of the pipelines of manual valves a and c. A flare-to-flare pipeline is connected between one-way valve b and manual valve x, and the flare-to-flare pipeline is divided into two lines: pipeline a and pipeline b. Manual valve v, an energy storage tank a, a safety valve d, and a manual valve p are sequentially installed on pipeline a. Manual valve w, an energy storage tank b, a safety valve e, and a manual valve q are sequentially installed on pipeline b. Needle valves a and b are sequentially installed between pipelines a and b, and pressure gauge d and needle valve c are installed between needle valves a and b. This system is mainly used in chemical production.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen supply technology, specifically relating to a centralized hydrogen supply system for analysis. Background Technology

[0002] Common carrier gases are nitrogen, hydrogen, and helium. Carrier gases are used to transfer sample compounds from the injection port to the separation column. Among them, hydrogen and nitrogen are more widely used due to their lower price.

[0003] The carrier gas analysis is highly sensitive to gas purity requirements, and the analytical instruments are expensive. The analysis results have high requirements for the stability of the carrier gas pressure. The flow rate is low, but the continuous flow requirement is high. If pipeline transportation is used, a large-diameter pipeline network needs to be built, which results in a large investment.

[0004] The applicant, through literature review, found that research on centralized analytical gas supply mainly focuses on laboratories. For example, Long Haiyang's "Construction and Application of Centralized Gas Supply Systems in University Laboratories" primarily describes the arrangement and centralized placement of various gas pipelines, but does not fundamentally solve the problem of stable gas supply solutions for large-scale gas consumption. Yang Ruiming's article "Application of Centralized Gas Supply Systems in Improving the Intrinsic Safety of University Mechanical Engineering Laboratories" mentions that centralized gas supply has significant safety advantages compared to decentralized gas supply, and improves the continuity and stability of gas supply. However, the content described is not applicable to the decentralized application in chemical plant analytical booths, and fails to effectively integrate the possibility of self-produced gases. The same situation exists in Zhu Qian's "Standardized Design of Centralized Gas Supply Systems in Petrochemical Laboratories." How to effectively reduce the consumption of analytical carrier gas, reduce external low storage, and increase the stability of analytical gas supply has become a technical challenge. Summary of the Invention

[0005] To address the technical problems mentioned in the background section, the present invention provides a new technical solution, as follows:

[0006] When the gas supply unit is located close to the main gas supply line and has a large capacity, the branch line can be directly connected to the main gas supply line.

[0007] The energy storage tank is designed to ensure that even if the gas supply is interrupted, the one-way valve b will take effect, and the gas source will be cut off. At this time, the analysis cabin can still continue to analyze samples for the device, ensuring that the chemical plant has continuous monitoring results.

[0008] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is provided with a manual valve a, a check valve a, a regulating valve a, a manual valve c, a sampler a, a check valve b, a manual valve x, and a sampler b in sequence.

[0009] Hand valve b is connected in parallel to the pipelines at both ends of hand valves a and c;

[0010] A flare line is connected between check valve b and manual valve x.

[0011] The flare line is divided into two routes, namely line a and line b.

[0012] Pipeline a is sequentially equipped with manual valve v, accumulator a, safety valve d and manual valve p;

[0013] The pipeline b is equipped with a manual valve w, an energy storage tank b, a safety valve e, and a manual valve q in sequence.

[0014] Needle valves a and b are installed sequentially between pipeline a and pipeline b, and pressure gauge d and needle valve c are installed between needle valves a and needle valve b.

[0015] When the gas source is far away and the gas demand is low, the following technical solutions can be adopted, as detailed below:

[0016] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is provided with a manual valve a, a check valve a, a regulating valve a, a manual valve c, a sampler a, a check valve b, a manual valve x, and a sampler b in sequence.

[0017] Hand valve b is connected in parallel to the pipelines at both ends of hand valves a and c;

[0018] A flare line is connected between check valve b and manual valve x.

[0019] The flare line is divided into two routes, namely line a and line b.

[0020] Pipeline a is sequentially equipped with manual valve v, accumulator a, safety valve d and manual valve p;

[0021] The pipeline b is equipped with a manual valve w, an energy storage tank b, a safety valve e, and a manual valve q in sequence.

[0022] A needle valve a and a needle valve b are sequentially installed between pipeline a and pipeline b, and a pressure gauge d and a needle valve c are installed between needle valve a and needle valve b.

[0023] The sampler a and the one-way valve b are connected in sequence by a gas storage tank, a regulating valve c, a manual valve g, a manual valve k, a manual valve j, a pressure gauge b, a secondary gas storage tank a, and a manual valve t;

[0024] The gas storage tank is connected to the flare via pipeline d, and pressure gauge a, regulating valve b and manual valve d are installed sequentially on pipeline d.

[0025] The extended gas supply pipeline is connected to the gas storage tank via pipeline;

[0026] A pipeline c is provided between the hand valve j and the pressure gauge b. The pipeline c is connected to the pipeline a. A hand valve r, a safety valve b, and a hand valve n are provided on the pipeline c.

[0027] The lower part of the gas storage tank is connected to the flare line via pipeline e, and pipeline e is equipped with pressure gauge b, manual valve h and manual valve i;

[0028] Pipeline f is connected between pipeline d and pipeline e. Pipeline f is equipped with manual valve e, safety valve a and manual valve f.

[0029] This method can reduce the diameter of construction pipelines, has a simple structure, and achieves two-stage gas storage. The two-stage gas storage tank can simultaneously receive and discharge gas, dynamically replenishing and supplying gas. Combined with the intermittent chromatographic analysis frequency, it can better meet the gas supply demand, and the gas supply device has high stability.

[0030] The energy storage tank is designed to ensure that the one-way valve b takes effect when the gas supply is interrupted. Even if the gas source is interrupted, the analysis cabin can still continue to analyze samples for the device, ensuring that the chemical plant has continuous monitoring results.

[0031] When the gas source is far away and the gas demand is large, the following technical solution is adopted:

[0032] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is provided with a manual valve a, a check valve a, a regulating valve a, a manual valve c, a sampler a, a check valve b, a manual valve x, and a sampler b in sequence.

[0033] Hand valve b is connected in parallel to the pipelines at both ends of hand valves a and c;

[0034] A flare line is connected between check valve b and manual valve x.

[0035] The flare line is divided into two routes, namely line a and line b.

[0036] Pipeline a is sequentially equipped with manual valve v, accumulator a, safety valve d and manual valve p;

[0037] The pipeline b is equipped with a manual valve w, an energy storage tank b, a safety valve e, and a manual valve q in sequence.

[0038] A needle valve a and a needle valve b are sequentially installed between pipeline a and pipeline b, and a pressure gauge d and a needle valve c are installed between needle valve a and needle valve b.

[0039] The sampler a and the one-way valve b are connected in sequence by a gas storage tank, a regulating valve c, a manual valve g, a manual valve k, a manual valve j, a pressure gauge b, a secondary gas storage tank a, and a manual valve t;

[0040] The gas storage tank is connected to the flare via pipeline d, and pressure gauge a, regulating valve b and manual valve d are installed sequentially on pipeline d.

[0041] The extended gas supply pipeline is connected to the gas storage tank via pipeline;

[0042] A pipeline c is provided between the hand valve j and the pressure gauge b. The pipeline c is connected to the pipeline a. A hand valve r, a safety valve b, and a hand valve n are provided on the pipeline c.

[0043] The lower part of the gas storage tank is connected to the flare line via pipeline e, and pipeline e is equipped with pressure gauge b, manual valve h and manual valve i;

[0044] Pipeline f is connected between pipeline d and pipeline e. Pipeline f is equipped with manual valve e, safety valve a and manual valve f.

[0045] A solenoid valve a is installed between the hand valve j and the pressure gauge b, and a solenoid valve c is installed between the secondary gas storage tank a and the hand valve t;

[0046] A pipeline g is connected in parallel next to the secondary gas storage tank a. The pipeline g is equipped with a manual valve l, a manual valve m, a solenoid valve b, a pressure gauge c, the secondary gas storage tank b, a solenoid valve d, and a manual valve u.

[0047] A pipeline h is connected between pressure gauge c and solenoid valve b. Pipeline h is connected to pipeline a. A manual valve s, a safety valve c, and a manual valve o are installed sequentially on pipeline h.

[0048] This method can reduce the diameter of construction pipelines, achieve complementary pressure between primary and secondary gas storage, use dual-stage gas storage tanks, and enable PLC-controlled gas replenishment via solenoid valves. It achieves high stability of a single-inlet, single-outlet continuous gas supply device, and is even suitable for devices within the plant area that do not generate gas. High-pressure hydrogen pipelines can be connected to unloading facilities, and gas can be drawn from centralized tank trucks outside the plant area for primary gas storage. This ensures a stable gas source while directly reducing the frequent loading and unloading of small gas cylinders, further guaranteeing the continuity of gas supply to the analysis cabin and thus ensuring the stability of the analysis results.

[0049] The storage tank is designed to ensure that in the event of a gas supply interruption, the one-way valve b will take effect, and the gas reserved in the storage tank will be used to replenish the gas pipeline network, giving the precision equipment in the analysis cabin sufficient time to continue operating and continue to serve the stable analysis needs of intermediate / final product samples from chemical plants.

[0050] Combined with the complete pressure relief flare system and GDS system on-site in chemical plants, this device is particularly suitable for installation in plant areas with many large chemical plants. Compared with traditional gas cylinder supply, it has significant advantages such as high safety, low operation frequency, and low manual maintenance cost. It also reduces the frequency of hazardous gas filling and is more conducive to the stable operation of modern large-scale chemical industrial parks.

[0051] The detailed working principle of this invention is as follows:

[0052] The device is equipped with a one-way valve a that can promptly stop the flow of hydrogen in the event of an interruption in the external H-1 hydrogen supply, preventing the external flow of hydrogen. In the event of an interruption in the external hydrogen supply, the gas storage tank, in conjunction with one-way valve a, can achieve a smooth transition in case of an emergency. Furthermore, a one-way valve b can promptly stop the flow of hydrogen in the secondary gas storage tank, releasing the stored hydrogen to the energy storage tank. This allows for a coordinated shutdown with the analysis cabin, providing time for the precision analytical instruments to cool down and ensuring a stable transition for high-value analytical instruments. The three-stage gas supply design—gas storage, secondary gas storage, and energy storage—effectively guarantees the analytical gas supply. Theoretically, when the one-way valve a in the gas storage tank is activated, the operator can promptly detect abnormal fluctuations in the gas supply and proactively add gas cylinder connections. The needle valve c has a reserved interface for supplementing analytical gas, enabling optimal results even with a gas supply interruption, ensuring continuous analysis.

[0053] The gas storage tank top of this device features a single measuring point and two-loop control. Pressure gauge a and regulating valve b form an active pressure relief process, primarily providing operators with control for the active release of minor overpressure. Especially when the pressure in the main hydrogen pipeline increases abnormally, pressure gauge a will perform real-time pressure detection and alarm, thereby actively releasing the overpressure portion and minimizing the disturbance caused by abnormal pressure. Pressure gauge a and regulating valve c form a pressure regulating gas supply loop, mainly completing the adjustment from 15-18MPa to 12-5MPa.

[0054] The high-pressure hydrogen pipeline is the main pipeline after hydrogen pressurization, with a pressure of 15MPa-18MPa at room temperature. The flare pipeline in the device is designed to effectively receive substandard tail gas and overpressure release gas, and is set to a slightly positive pressure of approximately 10-30 kPa. The extended gas supply pipeline in the device is an extension line to the pressure stabilizing device of the next analysis cabin, thereby realizing the series extension application of the multi-unit gas supply device of the present invention. It should be noted that the gas supply conditions at the analysis cabin interface are 12MPa-5MPa. It should also be noted that the analysis cabin connected to this device should be equipped with a pressure reducing device to further improve the stability of the gas supply pressure.

[0055] Preferably, safety valves a, b, c, d, and e in the device are located at potential pressure build-up positions, which significantly reduces the likelihood of pressure build-up explosions and further enhances the safety of the device. Maintenance of safety valves b, c, d, and e will be carried out simultaneously with the secondary gas storage tanks a / b and energy storage tanks a / b, thus saving the need for manual valves before the safety valves, further reducing sealing leakage points, and improving the overall operational stability of the device.

[0056] This device is equipped with solenoid valves above and below the secondary gas storage tank. Combined with the PLC panel, the gas storage / supply switching time of the gas storage tank can be set. The opening and closing states and speeds of solenoid valves a, b, c, and d can be batch-programmed to directly achieve automatic switching between gas replenishment and supply to the secondary gas storage tank. Reasonable batch-control timing can effectively minimize pressure fluctuations. Specifically, by default, when maintenance isolation hand valves k, l, t, and u are fully open, and secondary gas storage tank one is in the gas supply state (i.e., solenoid valve a is closed, solenoid valve c is open, and solenoid valves b and d are in the pressure-holding state), solenoid valve c needs to be activated for the parallel operation of secondary gas storage tanks a and b. Then, solenoid valve c closes, solenoid valve a opens, and secondary gas storage tank one replenishes gas, while secondary gas storage tank two supplies gas. The full opening and closing of solenoid valves a, b, c, and d can be completed within 1 second.

[0057] The present invention has the following beneficial effects:

[0058] This method achieves a stable supply of analytical gas by designing a two-stage gas storage and energy storage device, which can replace the traditional gas cylinder supply. Using this device can basically stop the external procurement of analytical gas cylinders, reduce the frequent loading and unloading of gas cylinders, save manpower, and this device also has many advantages such as low construction cost and strong anti-interference ability. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the working principle of the present invention;

[0060] Figure 2 This is diagram b, illustrating the working principle of the present invention.

[0061] Figure 3 This is diagram c, illustrating the working principle of the present invention. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] Example 1

[0064] like Figure 1 As shown:

[0065] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is sequentially equipped with a manual valve a1-1, a one-way valve a2-1, a regulating valve a3-1, a manual valve c1-3, a sampler a4-1, a one-way valve b2-2, a manual valve x1-24, and a sampler b4-2.

[0066] Hand valve b1-2 is connected in parallel to the pipelines at both ends of hand valves a1-1 and c1-3;

[0067] A flare line is connected between check valve B2-2 and manual valve X1-24.

[0068] The flare line is divided into two routes, namely line a and line b.

[0069] The pipeline a is equipped with a manual valve v1-22, an energy storage tank a9-1, a safety valve d6-4 and a manual valve p1-16 in sequence.

[0070] The pipeline b is equipped with a manual valve w1-23, an energy storage tank b9-2, a safety valve e6-5 and a manual valve q1-17 in sequence.

[0071] Needle valves a11-1 and b11-2 are installed sequentially between pipeline a and pipeline b. Pressure gauge d5-4 and needle valve c11-3 are installed between needle valves a11-1 and b11-2.

[0072] This method is suitable for situations where the gas supply device is close to the main gas supply line and has a large capacity. In this case, the branch line can be directly connected to the main gas supply line.

[0073] The energy storage tank is designed to ensure that the one-way valve b takes effect when the gas supply is interrupted. Even if the gas source is interrupted, the analysis cabin can still continue to analyze samples for the device, ensuring that the chemical plant has continuous monitoring results.

[0074] Example 2

[0075] like Figure 2 As shown:

[0076] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is sequentially equipped with a manual valve a1-1, a one-way valve a2-1, a regulating valve a3-1, a manual valve c1-3, a sampler a4-1, a one-way valve b2-2, a manual valve x1-24, and a sampler b4-2.

[0077] Hand valve b1-2 is connected in parallel to the pipelines at both ends of hand valves a1-1 and c1-3;

[0078] A flare line is connected between check valve B2-2 and manual valve X1-24.

[0079] The flare line is divided into two routes, namely line a and line b.

[0080] The pipeline a is equipped with a manual valve v1-22, an energy storage tank a9-1, a safety valve d6-4 and a manual valve p1-16 in sequence.

[0081] The pipeline b is equipped with a manual valve w1-23, an energy storage tank b9-2, a safety valve e6-5 and a manual valve q1-17 in sequence.

[0082] Needle valves a11-1 and b11-2 are sequentially installed between pipeline a and pipeline b. Pressure gauge d5-4 and needle valve c11-3 are installed between needle valves a11-1 and b11-2.

[0083] Between the sampler a4-1 and the one-way valve b2-2, there are sequentially arranged a gas storage tank 10, a regulating valve c3-3, a hand valve g1-7, a hand valve k1-11, a hand valve j1-10, a pressure gauge b5-2, a secondary gas storage tank a8-1, and a hand valve t1-20;

[0084] The gas storage tank 10 is connected to the flare via pipeline d. The pipeline d is equipped with pressure gauge a5-1, regulating valve b3-2 and manual valve d1-4 in sequence.

[0085] The extended gas supply pipeline is connected to the gas storage tank 10 via a pipeline;

[0086] A pipeline C is provided between hand valve J1-10 and pressure gauge B5-2. Pipeline C is connected to pipeline A. Hand valve R1-18, safety valve B6-2, and hand valve N1-14 are provided on pipeline C.

[0087] The lower part of the gas storage tank 10 is connected to the flare line via pipeline e, and pressure gauge b5-2, hand valve h1-8 and hand valve i1-9 are installed on pipeline e.

[0088] This method is suitable for applications where the gas source is far away and the gas demand is low. This method can reduce the diameter of the construction pipeline, has a simple structure, and achieves two-stage gas storage. The two-stage gas storage tank can simultaneously receive and discharge gas, dynamically replenishing the gas supply. Combined with the intermittent chromatographic analysis frequency, it can better meet the gas supply demand, and the gas supply device has high stability.

[0089] The energy storage tank is designed to ensure that the one-way valve b takes effect when the gas supply is interrupted. Even if the gas source is interrupted, the analysis cabin can still continue to analyze samples for the device, ensuring that the chemical plant has continuous monitoring results.

[0090] Example 3

[0091] like Figure 3 As shown:

[0092] A centralized hydrogen supply system for analysis includes a high-pressure hydrogen pipeline and an extended supply pipeline. The high-pressure hydrogen is connected to the analysis cabin via the pipeline, and the corresponding pipeline is sequentially equipped with a manual valve a1-1, a one-way valve a2-1, a regulating valve a3-1, a manual valve c1-3, a sampler a4-1, a one-way valve b2-2, a manual valve x1-24, and a sampler b4-2.

[0093] Hand valve b1-2 is connected in parallel to the pipelines at both ends of hand valves a1-1 and c1-3;

[0094] A flare line is connected between check valve B2-2 and manual valve X1-24.

[0095] The flare line is divided into two routes, namely line a and line b.

[0096] The pipeline a is equipped with a manual valve v1-22, an energy storage tank a9-1, a safety valve d6-4 and a manual valve p1-16 in sequence.

[0097] The pipeline b is equipped with a manual valve w1-23, an energy storage tank b9-2, a safety valve e6-5 and a manual valve q1-17 in sequence.

[0098] Needle valves a11-1 and b11-2 are sequentially installed between pipeline a and pipeline b. Pressure gauge d5-4 and needle valve c11-3 are installed between needle valves a11-1 and b11-2.

[0099] Between the sampler a4-1 and the one-way valve b2-2, there are sequentially arranged a gas storage tank 10, a regulating valve c3-3, a hand valve g1-7, a hand valve k1-11, a hand valve j1-10, a pressure gauge b5-2, a secondary gas storage tank a8-1, and a hand valve t1-20;

[0100] The gas storage tank 10 is connected to the flare via pipeline d. The pipeline d is equipped with pressure gauge a5-1, regulating valve b3-2 and manual valve d1-4 in sequence.

[0101] The extended gas supply pipeline is connected to the gas storage tank 10 via a pipeline;

[0102] A pipeline C is provided between hand valve J1-10 and pressure gauge B5-2. Pipeline C is connected to pipeline A. Hand valve R1-18, safety valve B6-2, and hand valve N1-14 are provided on pipeline C.

[0103] The lower part of the gas storage tank 10 is connected to the flare line via pipeline e, and pressure gauge b5-2, hand valve h1-8 and hand valve i1-9 are installed on pipeline e.

[0104] A solenoid valve a7-1 is installed between the hand valve j1-10 and the pressure gauge b5-2, and a solenoid valve c7-3 is installed between the secondary gas storage tank a8-1 and the hand valve t1-20.

[0105] A pipeline g is connected in parallel next to the secondary gas storage tank a8-1. The pipeline g is equipped with a hand valve l1-12, a hand valve m1-13, a solenoid valve b7-2, a pressure gauge c5-3, a secondary gas storage tank b8-2, a solenoid valve d7-4, and a hand valve u21.

[0106] A pipeline h is connected between pressure gauge c5-3 and solenoid valve b7-5. Pipeline h is connected to pipeline a. A hand valve s1-19, a safety valve c6-3, and a hand valve o15 are installed on pipeline h in sequence.

[0107] This invention is applicable to working conditions where the gas source is far away and the gas demand is large. This method can reduce the diameter of the construction pipeline, achieve complementary pressure between primary and secondary gas storage, use dual-stage gas storage tanks, and enable electronic valve PLC automatic gas replenishment. It achieves high stability of the single-inlet and single-outlet continuous gas supply device, and is even suitable for devices within the plant area that do not generate gas. The high-pressure hydrogen pipeline can be connected to the unloading facilities. Gas is collected from centralized tank trucks outside the plant area and stored in the primary gas storage. This ensures a stable gas source while directly reducing the frequent loading and unloading of small gas cylinders, further ensuring the continuity of gas supply to the analysis cabin, thereby ensuring the stability of the analysis results.

[0108] The storage tank is designed to ensure that in the event of a gas supply interruption, the one-way valve b will take effect, and the gas reserved in the storage tank will be used to replenish the gas pipeline network, giving the precision equipment in the analysis cabin sufficient time to continue operating and continue to serve the stable analysis needs of intermediate / final product samples from chemical plants.

[0109] Combined with the complete pressure relief flare system and GDS system on-site in chemical plants, this device is particularly suitable for installation in plant areas with many large chemical plants. Compared with traditional gas cylinder supply, it has significant advantages such as high safety, low operation frequency, and low manual maintenance cost. It also reduces the frequency of hazardous gas filling and is more conducive to the stable operation of modern large-scale chemical industrial parks.

[0110] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centralized hydrogen supply system for analysis, comprising a high-pressure hydrogen pipeline and an extended supply pipeline, characterized in that, High-pressure hydrogen is connected to the analysis cabin via pipelines. The corresponding pipelines are equipped with manual valve a (1-1), check valve a (2-1), regulating valve a (3-1), manual valve c (1-3), sampler a (4-1), check valve b (2-2), manual valve x (1-24), and sampler b (4-2). Hand valve b (1-2) is connected in parallel to the pipelines at both ends of hand valve a (1-1) and hand valve c (1-3); A flare line is connected between check valve b (2-2) and manual valve x (1-24). The flare supply line is divided into two routes, namely line a and line b. The pipeline a is equipped with a hand valve v (1-22), an energy storage tank a (9-1), a safety valve d (6-4) and a hand valve p (1-16) in sequence. The pipeline b is equipped with a hand valve w (1-23), an energy storage tank b (9-2), a safety valve e (6-5), and a hand valve q (1-17) in sequence. A needle valve a (11-1) and a needle valve b (11-2) are installed sequentially between pipeline a and pipeline b. A pressure gauge d (5-4) and a needle valve c (11-3) are installed between needle valve a (11-1) and needle valve b (11-2).

2. The centralized hydrogen supply system for analysis as described in claim 1, characterized in that, The sampler a (4-1) and the one-way valve b (2-2) are connected in sequence by a gas storage tank (10), a regulating valve c (3-3), a hand valve g (1-7), a hand valve k (1-11), a hand valve j (1-10), a pressure gauge b (5-2), a secondary gas storage tank a (8-1), and a hand valve t (1-20). The gas storage tank (10) is connected to the flare through pipeline d. The pipeline d is equipped with pressure gauge a (5-1), regulating valve b (3-2) and manual valve d (1-4) in sequence. The extended gas supply pipeline is connected to the gas storage tank (10) via a pipeline; A pipeline c is provided between hand valve j (1-10) and pressure gauge b (5-2). Pipeline c is connected to pipeline a. Hand valve r (1-18), safety valve b (6-2), and hand valve n (1-14) are provided on pipeline c. The lower part of the gas storage tank (10) is connected to the flare line via pipeline e. The pipeline e is equipped with pressure gauge b (5-2), hand valve h (1-8) and hand valve i (1-9). Pipeline f is connected between pipeline d and pipeline e. Pipeline f is equipped with hand valve e (1-5), safety valve a (6-1) and hand valve f (1-6).

3. The centralized hydrogen supply system for analysis as described in claim 2, characterized in that, A solenoid valve a (7-1) is installed between the hand valve j (1-10) and the pressure gauge b (5-2), and a solenoid valve c (7-3) is installed between the secondary gas storage tank a (8-1) and the hand valve t (1-20). A pipeline g is connected in parallel to the secondary gas storage tank a (8-1). The pipeline g is equipped with a hand valve l (1-12), a hand valve m (1-13), a solenoid valve b (7-2), a pressure gauge c (5-3), a secondary gas storage tank b (8-2), a solenoid valve d (7-4), and a hand valve u (21). A pipeline h is connected between pressure gauge c (5-3) and solenoid valve b (7-2). Pipeline h is connected to pipeline a. A hand valve s (1-19), a safety valve c (6-3), and a hand valve o (15) are installed on pipeline h in sequence.

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